Telecom Tutorials by Samir Amberkar

LTE - UE States (Detach) [Under LTE]
» E-UTRA and E-UTRAN overall description - 36.300, Rel 8 «
» E-UTRAN access - 23.401, Rel 8 «
» NAS - 24.301, Rel 8 «
» RRC - 36.331, Rel 8 «

Overall NAS/AS states reference: 23.401:4.6, 24.301:5.1.3, 36.300:A.2, 36.331:4.2.1


Case a) Network initiated

	Bearer contexts active EMM_REGISTERED (NORMAL SERVICE) RRC_CONNECTED
		Detach Request ←
	Bearer contexts inactive EMM_DEREGISTERED RRC_CONNECTED	Detach Accept →
		RRC Connection Release ←
	EMM_DEREGISTERED RRC_IDLE (DRBs released if present)

Case b) UE initiated

	Bearer contexts active EMM_REGISTERED (NORMAL SERVICE) RRC_CONNECTED
	+CFUN=0
	EMM_DEREGISTERED_INITIATED RRC_CONNECTED	Detach Request →
		Detach Accept ←
	Bearer contexts inactive EMM_DEREGISTERED RRC_CONNECTED
		RRC Connection Release ←
	EMM_DEREGISTERED RRC_IDLE (DRBs released if present)

Copyright © Samir Amberkar 2010-12

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